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PRELIMINARY ASSAYS INDICATE THAT ANTONIA OVATA (LOGANIACEAE) AND DERRIS AMAZONICA (PAPILIONACEAE), ICHTHYOTOXIC PLANTS USED FOR FISHING IN RORAIMA, BRAZIL, HAVE AN INSECTICIDE EFFECT ON LUTZOMYIA LONGIPALPIS (DIPTERA: PSYCHODIDAE: PHLEBOTOMINAE)
Derris amazonica
Antonia ovata
Extrato ictiotóxico
Timbó
Inseticidas naturais
Roraima
Brasil
Timbó
Natural insecticides
Lutzomyia longipalpis
Derris amazonica
Antonia ovata
Roraima State
Brazil
Autor
Afiliación
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Núcleo Avançado de Vetores. Rio de Janeiro, RJ, Brasil.
Instituto Nacional de Pesquisas da Amazônia. Manaus, AM, Brasil.
Universidade do Amazonas. Departamento de Química. Manaus, AM, Brasil.
Sem afiliação
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Rio de Janeiro, RJ, Brasil.
Instituto Nacional de Pesquisas da Amazônia. Manaus, AM, Brasil.
Universidade do Amazonas. Departamento de Química. Manaus, AM, Brasil.
Sem afiliação
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Entomologia. Rio de Janeiro, RJ, Brasil.
Resumen en ingles
Laboratory-reared Lutzomyia longipalpis (Lutz and Neiva 1912) was tested with extracts of two ichthyotoxic plants, known as timbós, used as fishing poison in the Amazon. Phlebotomines, L. longipalpis, and plants, Antonia ovata and Derris amazonica, were collected in the Raposa-Serra do Sol Indian Reserve, a focus of visceral leishmaniasis in the State of Roraima, Brazil. Extracts were prepared from dried leaves of A. ovata and roots of D. amazonica that were percolated in water, filtered and dried out at 50°C. The solid extract obtained was diluted in water at 150, 200 and 250 mg/ml. The solution was blotted in filter paper placed at the bottom of cylindric glass tubes containing sand flies. For each plant extract and dilution, two series of triplicates with 5 male and 5 female specimens of L. longipalpis were used. Mortality was recorded every 2 h during 72 h of exposure. At 72 h the mortality was as high as 80% for extracts of A. ovata (LD50 = 233 mg/ ml), and 100% for D. amazonica (LD50 = 212 mg/ ml) whereas in the control groups maximum mortality never surpassed 13%. Preliminary assays indicated that A. ovata and D. amazonica displayed significant insecticide effect against L. longipalpis.
Palabras clave en portugues
Lutzomyia longipalpisDerris amazonica
Antonia ovata
Extrato ictiotóxico
Timbó
Inseticidas naturais
Roraima
Brasil
Palabras clave en ingles
Ichthyotoxic extractTimbó
Natural insecticides
Lutzomyia longipalpis
Derris amazonica
Antonia ovata
Roraima State
Brazil
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